36. a7e7 The final mistake. 36... e4f2 [%c_effect f2;square;f2;type;GreatFind;persistent;true] A nice tactical shot. 37. e7e3  37... d5d4 [%c_effect d4;square;d4;type;GreatFind;persistent;true][%c_arrow a8h1;keyPressed;none;from;a8;opacity;0.8;to;h1;persistent;false] Opening the diagonal for the monster bishop. 38. f4d4 